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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
logger.py
~~~~~~~~~
logging classes
:copyright: (c) 2013 by Jauhien Piatlicki
:license: GPL-2, see LICENSE for more details.
"""
import sys
import portage
class Logger(object):
"""
A simple logger object. Uses portage out facilities.
"""
def __init__(self):
self.out = portage.output.EOutput()
def error(self, message):
self.out.eerror(message)
def info(self, message):
self.out.einfo(message)
def warn(self, message):
self.out.ewarn(message)
class ProgressBar(object):
"""
A progress bar for CLI
"""
__slots__ = ('length', 'total', 'processed', 'chars')
def __init__(self, length, total, processed = 0):
"""
Args:
length: Length of the progress bar.
total: The overall number of items to process.
processe: Number of processed items.
"""
self.length = length
self.total = total
self.chars = ['-', '\\', '|', '/']
self.processed = processed
def begin(self):
"""
Start displaying the progress bar with 0% progress.
"""
self.processed = 0
self.display()
def display(self, processed = None):
"""
Show the progress bar with current progress.
Args:
processed: Number of processed items.
"""
if processed:
self.processed = processed
show = self.chars[self.processed % 4]
percent = (self.processed * 100)//self.total
progress = (percent * self.length)//100
blank = self.length - progress
sys.stderr.write("\r %s [%s%s] %s%%" % \
(show, "#" * progress, " " * blank, percent))
sys.stderr.flush()
def increment(self, count = 1):
"""
Increment number of processed items.
Args:
count: Step of incrementation.
"""
self.processed += count
self.display()
def end(self):
"""
Show 100%.
"""
self.processed = self.total
self.display()
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